539940 (2017 HW1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4585305393 ± 1.85e-08
Semi-major axis (a)2.1379494101 AU ± 2.27e-08
Inclination (i)33.93429844° ± 5.61e-06
Long. of Asc. Node (Ω)41.31082257° ± 2.15e-06
Arg. of Perihelion (ω)168.80631156° ± 8.78e-06
Mean Anomaly (M)282.85413711° ± 1.06e-05
Mean Motion (n)0.3152943146°/day ± 5.02e-09
Perihelion dist (q)1.15763431 AU ± 4.14e-08
Aphelion dist (Q)3.11826451 AU ± 5.16e-08
Orbital Period3.12605156 yr ± 4.97e-08
Physical Parameters
H (abs. magnitude)18.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.518″
Uncertainty0
Orbit TypeAmor
MOID0.155744 AU
Observations Used1400
Oppositions9
Arc Total2012-2025
First Observation Used2012-10-22
Last Observation Used2025-12-13
Observations (2295)
Date Type RA Dec Mag Band Observatory
2020-04-04 04:44:18 s 1 +171478.90 2 +188081.80 4960.0 C57
2020-04-04 05:44:18 S 15 46 44.974 +51 43 58.26 V C57
2020-04-04 05:44:18 s 1 +170670.60 4 +192435.39 5600.0 C57
2020-04-04 06:14:18 S 15 46 42.084 +51 43 23.52 V C57
2020-04-04 06:14:18 s 1 +170247.22 3 +194590.38 1340.0 C57
2020-04-04 06:44:18 S 15 46 38.750 +51 42 50.08 V C57
2020-04-04 06:44:18 s 1 +169811.32 7 +196730.90 1010.0 C57
2020-04-04 08:14:18 S 15 46 29.626 +51 41 01.32 V C57
2020-04-04 08:14:18 s 1 +168430.75 6 +203066.34 5970.0 C57
2020-04-04 08:44:18 S 15 46 27.067 +51 40 21.36 V C57
2020-04-04 08:44:18 s 1 +167946.98 5 +205149.64 3710.0 C57
2020-04-04 09:14:18 S 15 46 24.132 +51 39 52.42 V C57
2020-04-04 09:14:18 s 1 +167451.76 7 +207218.80 6530.0 C57
2020-04-04 09:44:18 S 15 46 20.767 +51 39 11.81 V C57
2020-04-04 09:44:18 s 1 +166945.30 3 +209273.87 4640.0 C57
2020-04-04 10:14:18 S 15 46 17.623 +51 38 36.10 V C57
2020-04-04 10:14:18 s 1 +166427.78 9 +211314.92 8250.0 C57
2020-04-04 10:44:18 S 15 46 14.635 +51 38 01.86 V C57
2020-04-04 10:44:18 s 1 +165899.41 6 +213342.00 7580.0 C57
2020-04-04 11:14:18 S 15 46 11.647 +51 37 23.84 V C57
2020-04-04 11:14:18 s 1 +165360.37 1 +215355.18 2820.0 C57
2020-04-04 11:44:18 S 15 46 09.029 +51 36 52.88 V C57
2020-04-04 11:44:18 s 1 +164810.83 8 +217354.52 4170.0 C57
2020-04-04 13:14:18 S 15 45 59.882 +51 35 02.11 V C57
2020-04-04 13:14:18 s 1 +163101.09 0 +223270.14 6810.0 C57
2020-04-04 13:44:18 S 15 45 56.674 +51 34 24.42 V C57
2020-04-04 13:44:18 s 1 +162511.36 6 +225214.74 4520.0 C57
2020-04-04 14:14:18 S 15 45 53.431 +51 33 49.72 V C57
2020-04-04 14:14:18 s 1 +161912.01 5 +227145.81 9270.0 C57
2020-04-04 14:44:18 S 15 45 50.770 +51 33 18.83 V C57
2020-04-04 14:44:18 s 1 +161303.20 1 +229063.41 1250.0 C57
2020-04-04 15:14:18 S 15 45 47.508 +51 32 37.32 V C57
2020-04-04 15:14:18 s 1 +160685.08 2 +230967.60 620.0 C57
2020-04-04 15:44:18 S 15 45 44.407 +51 32 05.32 V C57
2020-04-04 15:44:18 s 1 +160057.81 3 +232858.43 7560.0 C57
2020-04-04 16:14:18 S 15 45 41.671 +51 31 26.94 V C57
2020-04-04 16:14:18 s 1 +159421.54 7 +234735.97 2240.0 C57
2020-04-04 16:44:18 S 15 45 38.258 +51 30 51.16 V C57
2020-04-04 16:44:18 s 1 +158776.43 3 +236600.28 4810.0 C57
2020-04-04 17:14:18 S 15 45 35.537 +51 30 18.32 V C57
2020-04-04 17:14:18 s 1 +158122.61 9 +238451.41 5450.0 C57
2020-04-04 17:44:18 S 15 45 32.345 +51 29 40.81 V C57
2020-04-04 17:44:18 s 1 +157460.24 7 +240289.42 4300.0 C57
2020-04-04 18:14:18 S 15 45 29.215 +51 29 04.67 V C57
2020-04-04 18:14:18 s 1 +156789.45 9 +242114.38 1520.0 C57
2020-04-04 18:44:18 S 15 45 26.244 +51 28 28.31 V C57
2020-04-04 18:44:18 s 1 +156110.39 2 +243926.33 7260.0 C57
2020-04-04 19:14:18 S 15 45 23.030 +51 27 54.79 V C57
2020-04-04 19:14:18 s 1 +155423.18 4 +245725.34 1680.0 C57
2020-04-04 19:44:18 S 15 45 20.172 +51 27 18.83 V C57